Tagged Questions

I want to compute an unsupervised random forest classification out of a raster stack in R. The raster stack represents the same extent in different spectral bands and as a result I want to obtain an ...

Many recent maps I have seen have these neat two-way color gradients that can be used to color correlations between continuous estimates.
Here is an example taken from a recent publication (Source: ...

I have two raster objects r1 (in grey and green) and r2 (in pink) that I want to intersect with R.
I tried with the R function intersect from the raster package but it only intersect the extent of the ...

I have a list of coordinates with which i can create a path and I want to export this list as shp. I have "shapefiles" package but I didn't find the way to do this. Is there a way to do this with this ...

I'm trying to find a R package that allows me to do geographically weighted negative binomial regression. I'm aware there's 'spgwr' and 'glm.nb' package. But is there a package that combines the two? ...

I have several doubts, so I will try to be as clear as possible... thanks for your understanding.
I am generating a regression model using several environmental covariates. Before importing the GIS ...

I'm looking to generate a geographic heatmap (using 'ggmap') that overlays some dimension (to start, housing prices) over the lat/lon near a city center. Then I want to create circles of equi-distant ...

I would like to find width-height of a non-contiguous polygon in order to draw paths within it. My question: Is it better to use a bounding box (contiguous polygon) and then clip keeping my real area ...

In ArcGIS, I can generate a kernel density map and weigh it by population field. For example, I can use city's population as weighting factor, so that more populated city has higher influence to the ...

I am going to perform an unsupervised classification on my dataset and will get a map as a result. The objective is to rebuild an already existing map (of different soil types) with my new dataset. ...

Let us consider a point (longitude, latitude) on Earth (location).
How to construct a square grid around this point (taking this point as the centre of the square or intercept of the two diagonals) ...

I want to load .adf files into R. The data is from this page:
http://www.fao.org/geonetwork/srv/en/metadata.show?id=14057
I tried the following code that I found after some research in the internet.
...

I wonder if anybody has some experience in calculating biodiversity index (such as Shannon-Weiner) using QGis. I am also interested for similar experiences using R scripts within QGis. The analysis ...

I am in the process of creating a spatial polygon map for the Valencia region in Spain. I asked the question in StackOverflow (http://stackoverflow.com/q/19791210/709777) and could produce the map.
...

I have a shapefile which represents the areas of a city which have higher risks of flooding than others. This is a spatial polygon object however the polygon is disjoint and not connected. I also have ...

I would like to perform a spatial overlay to identify the polygon within which a set of points fall. However I first want to buffer and dissolve the polygons, such that points falling anywhere within ...